You'd be surprised how much 500K means if you're not Samsung or Apple. There's recent products you'd say were clear hits and sold an order of magnitude more than that, but in actuality, it was exactly 350K.
But I didn’t say 500k is not a lot or that it’s not successful; I say that it is a niche and it’s not immensely popular. It’s successful in its niche. Again, the comment I replied to used those terms and that’s just not true. I don’t care and wish them all the luck and selling 100m of these things, but if I have to think about how many zeros behind the comma to write the % of human owners, this is not a non niche or popular product. Knock on your neighbours door and ask what it is; they won’t know and they also would never ever buy one.